Transcription of Balanced vs. Unbalanced Audio Interconnections
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Balanced vs. Unbalanced Audio Interconnections
Henry Ott Consultants 2005-2008 Henry W. Ott Revised 7/2/08 Balanced vs. Unbalanced Audio Interconnections In discussing the characteristics and performance of various interconnect systems; two points should be kept in mind. Balance is defined in terms of the impedance of the two signal conductors with respect to a reference, which is usually ground. If these impedances are equal and non-zero, the system is Balanced . If the impedances are unequal the system is Unbalanced . A signal conductor with a grounded return conductor is, therefore, an Unbalanced (sometimes referred to as a single ended) system. A small, common-mode, 60 Hz noise, voltage can exist between the chassis of two AC powered devices regardless of whether they are safety grounded (use a three-wire plug) or not. Unbalanced Interconnections An Unbalanced (single ended) interface uses only two conductors to carry the signal from one device to another, one conductor carries the signal and the other is the grounded return.
Henry Ott Consultants ©2005-2008 Henry W. Ott When using unbalanced interconnections between audio equipment the primary noise-
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